Critical currents and critical temperatures of oxygenated Tl-2223 bulk superconductors

Marek Giebułtowski; Wiesław Marek Woch; Marcin Kowalik; Ryszard Zalecki; Łukasz Gondek; Janusz Niewolski

doi:10.1117/12.2525433

14 May 2019 Critical currents and critical temperatures of oxygenated Tl-2223 bulk superconductors

Marek Giebułtowski, Wiesław Marek Woch, Marcin Kowalik, Ryszard Zalecki, Łukasz Gondek, Janusz Niewolski

Proceedings Volume 11054, Superconductivity and Particle Accelerators 2018; 110540K (2019) https://doi.org/10.1117/12.2525433
Event: Superconductivity and Particle Accelerators 2018, 2018, Krakow, Poland

Abstract

The thallium based superconductor Tl₂Ba₂Ca₂Cu₃O_y was prepared using a three-step calcination and sintering method. Afterwards, the pellet was two times oxygenated in 740^oC for 20 h. Taking the absorption part of the a.c. susceptibility measurements the critical current density turned out to be from 20 A/cm² before oxygenations, through 380 A/cm² after the first oxygenation to 1120 A/cm² after the second oxygenation. The critical temperature from the dispersion part of the a.c. susceptibility measurements was determined to be 99.7 K, 112.8 K, and 116.2 K respectively.

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Marek Giebułtowski, Wiesław Marek Woch, Marcin Kowalik, Ryszard Zalecki, Łukasz Gondek, and Janusz Niewolski "Critical currents and critical temperatures of oxygenated Tl-2223 bulk superconductors", Proc. SPIE 11054, Superconductivity and Particle Accelerators 2018, 110540K (14 May 2019); https://doi.org/10.1117/12.2525433

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